<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <style>
    body,
    ul,
    li {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .brands {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      gap: 3vh;
    }

    .brands__item {
      flex: 0 1 calc((100vw - 3vh * (4 - 1)) / 4);
      background: #eee;
    }

    .brands__item a {
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100%;
    }

    .brands__item img {
      width: 130px;
      height: 75px;
      object-fit: contain;
      mix-blend-mode: multiply;
    }
  </style>
</head>

<body>
  <ul class="brands">
    <li class="brands__item">
      <a href="#">
        <img src="img/logo1.png" alt="">
      </a>
    </li>
    <li class="brands__item">
      <a href="#">
        <img src="img/logo2.png" alt="">
      </a>
    </li>
    <li class="brands__item">
      <a href="#">
        <img src="img/logo3.png" alt="">
      </a>
    </li>
    <li class="brands__item">
      <a href="#">
        <img src="img/logo4.png" alt="">
      </a>
    </li>
    <li class="brands__item">
      <a href="#">
        <img src="img/logo5.png" alt="">
      </a>
    </li>
    <li class="brands__item">
      <a href="#">
        <img src="img/logo6.png" alt="">
      </a>
    </li>
  </ul>
</body>

</html>